MESON Chess Problem Database

Problem Display
PID: 78687 (2Kb3n/pR4pq/QN3kr1/R5pp/1pp2N2/2rn4/8/BB6 w - - 0 1)

Dobbs, Gilbert S

The Chess Review, 1937

2Kb3n/pR4pq/QN3kr1/R5pp/1pp2N2/2rn4/8/BB6

#2

8 + 13

56 The Problemist 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Sc1
      • 2.Rf5#
    • 1...Se1
      • 2.Rf5#
    • 1...Sb2
      • 2.Rf5#
    • 1...Sf2
      • 2.Rf5#
    • 1...Se5
      • 2.Sbd5#
  • Tries
    • 1.Bxc3+?
      • 1...Se5
        • 2.Sbd5#
        • 2.Bxe5#
      • 1...bxc3!
  • Keys
    • 1.Qxc4!
      • threat
        • 2.Qc6#
      • 1...Sxf4
        • 2.Rf5#
      • 1...Bc7
        • 2.Qe6#
      • 1...Sc5
        • 2.Qd4#
      • 1...Qg8
        • 2.Sxh5#
      • 1...Be7
        • 2.Sd7#
      • 1...Sb2
        • 2.Rf5#
      • 1...Se5
        • 2.Sbd5#
      • 1...Sf7
        • 2.Rxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • S(b);::R1(D)
    • S(b);N_SPINR(a)::R1(D)
    • S(b);N_SPINR(a),SBLOCK::QAR(E)+S(F),DCHECK
  • Tries
    • Try
      • B(A);CHECK,XR(a)
      • Refutation
        • P(c);XB(A)
  • Actual
    • Q(E);P_SPINQ(E),XP(d)
    • Threat
      • QAR(E)
    • Vars
      • S(b);XS(C)::R1(D)
      • B(l);N_PINQ(E)::QAR1(E)
      • S(b);N_PINQ(E)::QAB(E)
      • Q(k);N_GUARD::S(C),XP(f)
      • B(l);SBLOCK::S(F)
      • S(b);N_SPINR(a)::R1(D)
      • S(b);N_SPINR(a),SBLOCK::S(F)
      • S(m);N_GUARD::R1(G),XS(m)
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